Analog Devices AD1940 Evaluation Board EVAL-AD1940AZ EVAL-AD1940AZ Data Sheet
Product codes
EVAL-AD1940AZ
SigmaDSP
TM
28-/56-Bit Audio Processor
Evaluation Board
Preliminary Technical Data
EVAL-AD1940AZ
Rev. PrA
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responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
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EVALUATION BOARD OVERVIEW
This document explains the design and setup of the AD1940
SigmaDSP evaluation board.
SigmaDSP evaluation board.
The EVAL-AD1940AZ provides a full range of analog and
digital inputs and outputs to and from the AD1940. The
SigmaDSP can connect to analog I/O signals through the
AD1939 codec and AD1974 ADC. Digital I/O connections are
available in both S/PDIF and 3-wire serial data formats. The
DSP is controlled by Analog Devices’ SigmaStudio
digital inputs and outputs to and from the AD1940. The
SigmaDSP can connect to analog I/O signals through the
AD1939 codec and AD1974 ADC. Digital I/O connections are
available in both S/PDIF and 3-wire serial data formats. The
DSP is controlled by Analog Devices’ SigmaStudio
TM
software,
which interfaces to the evaluation boards with a USB cabke via
the EVAL-ADUSB2EBZ add-on board, also known as the USBi.
Power is distributed by a single DC supply, which is regulated to
the necessary voltages on the board. The PCB is an 7” × 5” 4-
layer design with split analog and digital power and ground
planes on the two inner layers.
the EVAL-ADUSB2EBZ add-on board, also known as the USBi.
Power is distributed by a single DC supply, which is regulated to
the necessary voltages on the board. The PCB is an 7” × 5” 4-
layer design with split analog and digital power and ground
planes on the two inner layers.
The AD1940 evaluation board should be used for AD1941
evaluation. There is no AD1941 evaluation board.
evaluation. There is no AD1941 evaluation board.
PACKAGE CONTENTS
The EVAL-AD1940AZ package contains these items:
• AD1940 evaluation board
• EVAL-ADUSB2EBZ (USBi) communications adapter
• 6V DC power supply with standard US plug
• USB cable with mini-B plug
• Evaluation board/software quick-start guide
• SigmaStudio software
• EVAL-ADUSB2EBZ (USBi) communications adapter
• 6V DC power supply with standard US plug
• USB cable with mini-B plug
• Evaluation board/software quick-start guide
• SigmaStudio software
OTHER SUPPORTING DOCUMENTATION
AD1940/AD1941 datasheet
AD1939 datasheet
AD1974 datasheet
SigmaStudio Help (included in the software installation)
AN-1006: Using the EVAL-ADUSB2EBZ
AD1939 datasheet
AD1974 datasheet
SigmaStudio Help (included in the software installation)
AN-1006: Using the EVAL-ADUSB2EBZ
FUNCTIONAL BLOCK DIAGRAM
AD1940
PERFORMANCE AUDIO
DSP
POWER SUPPLY
REGULATION
AD1939
CODEC
AD1974
ADC
ANALOG OUTPUTS
ANALOG INPUTS
XXXXX-
XXX
INPUT
SIGNAL
ROUTING
JUMPERS
USBi INTERFACE
(USB TO SPI)
S/PDIF RECEIVER
EXTERNAL DIGITAL
(I
2
S/TDM INPUTS)
S/PDIF TRANSMITTER
EXTERNAL DIGITAL
(I
2
S/TDM OUTPUTS)
Figure 1. Functional Block Diagram